Oil supply throttling device for cold running of engine and starting before release of starter

Abstract

The invention provides an oil supply throttling device for cold running of an engine and starting before release of a starter, which comprises a shell provided with a chute and a pressure cavity which are separated from each other, an oil supply path for circulation of lubricating oil is arranged in the chute, and the pressure cavity is provided with an air inlet connected with starter bleed air and an air outlet connected with balance bleed air; the valve comprises a gate valve, a partition plate and a connecting rod for connecting the gate valve and the partition plate; the spring is arranged in the pressure cavity and located between the partition plate and the shell. When an engine is in cold running or a starter is started before being disengaged, the starter introduces air into the pressure cavity from the air inlet, the partition plate overcomes the pressure of the spring and balances the air introduction pressure to enable the gate valve to slide downwards in the sliding groove, then the pipe diameter of the lubricating oil supply way is reduced, and the oil supply amount is reduced; when cold running of the engine is finished or starting of the engine is finished, the balance bleed air enters the pressure cavity from the exhaust port, the spring enables the partition plate to drive the gate valve to slide in the sliding groove, then the pipe diameter of the lubricating oil supply way is restored to be normal, and full-state oil supply is achieved.

Description

technical field [0001] The application belongs to the technical field of engine control, and in particular relates to an oil supply throttling device used for engine cold running and starting before the starter is disengaged. Background technique [0002] When the engine is running in a cold or low state, the three bearing chambers of the front, middle and rear of the engine are prone to oil leakage to varying degrees. By analyzing a large amount of test data, it is found that the above phenomenon occurs when the engine is running cold and the engine is started (before the starter is disengaged). This is because when the engine state is low, the sealing bleed air pressure is insufficient and cannot meet the sealing pressure in the normal state. At the same time, the oil supply and return relationship is poorly matched, and the lubricating oil pumped by the lubricating oil pump unit to each bearing cavity cannot be recovered reasonably by the oil return pump unit. [0003] ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide an oil supply throttling device for engine cold running and starting before the starter is disengaged, to solve or alleviate at least one of the above question

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